EP 0578469 A3 19940622 - IMPROVEMENTS IN AND RELATING TO APPLYING COATINGS
Title (en)
IMPROVEMENTS IN AND RELATING TO APPLYING COATINGS
Publication
Application
Priority
US 91078292 A 19920708
Abstract (en)
[origin: EP0578469A2] Apparatus and methods for producing intermittent, discrete patterns of coating material onto discrete irregular substrate areas, such as electronic circuit boards, where the patterns have sharp, square leading and trailing edges, as well as side edges. A slot nozzle die has elongated air slots along the slot extrusion opening. In the operation of the apparatus, the air flow is initiated from both air slots prior to the initiation of the coating material flow. Also, the air flow is continued beyond that point in time, when the coating material flow ceases. The delays between the operations of the air flow and the hot melt flow are on the order of micro seconds. Alternatively, the lead and lag air start and stop times on each side of the film of coating material are different to control the exact disposition of the square cut-on and square cut-off coating edge on the circuit board. The air flow carries the film coating material to the circuit board for deposition in discrete areas thereon. The sharp cut-on and cut-off accommodate multiple discrete area coating or multiple automated circuit board coating. <IMAGE>
IPC 1-7
IPC 8 full level
B05B 7/08 (2006.01); B05C 5/02 (2006.01); B05D 1/26 (2006.01); B05D 3/04 (2006.01); B05D 7/00 (2006.01); H05K 3/00 (2006.01); H05K 3/28 (2006.01)
CPC (source: EP US)
B05B 7/0861 (2013.01 - EP US); B05C 5/0254 (2013.01 - EP US); B05C 5/0291 (2013.01 - EP US); B05D 1/265 (2013.01 - EP US); B05D 3/042 (2013.01 - EP US); H05K 3/0091 (2013.01 - EP US); H05K 3/284 (2013.01 - EP US); H05K 2201/09872 (2013.01 - EP US); H05K 2201/0989 (2013.01 - EP US); H05K 2203/0126 (2013.01 - EP US); H05K 2203/081 (2013.01 - EP US); H05K 2203/1366 (2013.01 - EP US); H05K 2203/1476 (2013.01 - EP US); H05K 2203/1509 (2013.01 - EP US); H05K 2203/159 (2013.01 - EP US)
Citation (search report)
- [A] EP 0362548 A2 19900411 - NORDSON CORP [US]
- [DA] US 4720252 A 19880119 - APPEL DAVID W [US], et al
- [DA] US 4891249 A 19900102 - MCINTYRE FREDERIC S [US]
- [DA] US 4880663 A 19891114 - SHIMADA TAKAJI [JP]
- [A] US 4774109 A 19880927 - HADZIMIHALIS THEODORE M [US], et al
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0578469 A2 19940112; EP 0578469 A3 19940622; EP 0578469 B1 19950927; CA 2098784 A1 19940109; DE 69300548 D1 19951102; DE 69300548 T2 19960321; JP 3614446 B2 20050126; JP H06154691 A 19940603; US 5409733 A 19950425; US 5720820 A 19980224
DOCDB simple family (application)
EP 93305269 A 19930705; CA 2098784 A 19930618; DE 69300548 T 19930705; JP 16918793 A 19930708; US 25981894 A 19940615; US 38813895 A 19950213